<?php


namespace app\api\common;


class Iconv
{
    function phpmake_ico() {

        return true;

    }

    function GDtoICOstr(&$gd_ico_array) {

        foreach ($gd_ico_array as $key => $gd_image) {

            $IcoWidths[$key]  = ImageSX($gd_image);

            $IcoHeights[$key] = ImageSY($gd_image);

            $bpp[$key]          = ImageIsTrueColor($gd_image) ? 32 : 24;

            $totalcolors[$key]  = ImageColorsTotal($gd_image);

            $icXOR[$key] = '';

            for ($y = $IcoHeights[$key] - 1; $y >= 0; $y--) {

                for ($x = 0; $x < $IcoWidths[$key]; $x++) {

                    $argb = $this->gpc($gd_image, $x, $y);

                    $a = round(255 * ((127 - $argb['alpha']) / 127));

                    $r = $argb['red'];

                    $g = $argb['green'];

                    $b = $argb['blue'];

                    if ($bpp[$key] == 32) {

                        $icXOR[$key] .= chr($b).chr($g).chr($r).chr($a);

                    } elseif ($bpp[$key] == 24) {

                        $icXOR[$key] .= chr($b).chr($g).chr($r);

                    }

                    if ($a < 128) {

                        @$icANDmask[$key][$y] .= '1';

                    } else {

                        @$icANDmask[$key][$y] .= '0';

                    }

                }

                while (strlen($icANDmask[$key][$y]) % 32) {

                    $icANDmask[$key][$y] .= '0';

                }

            }            $icAND[$key] = '';

            foreach ($icANDmask[$key] as $y => $scanlinemaskbits) {

                for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) {

                    $icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));

                }

            }

        }

        foreach ($gd_ico_array as $key => $gd_image) {

            $biSizeImage = $IcoWidths[$key] * $IcoHeights[$key] * ($bpp[$key] / 8);

            $bfh[$key]  = '';

            $bfh[$key] .= "\x28\x00\x00\x00";

            $bfh[$key] .= $this->le2s($IcoWidths[$key], 4);

            $bfh[$key] .= $this->le2s($IcoHeights[$key] * 2, 4);

            $bfh[$key] .= "\x01\x00";

            $bfh[$key] .= chr($bpp[$key])."\x00";

            $bfh[$key] .= "\x00\x00\x00\x00";

            $bfh[$key] .= $this->le2s($biSizeImage, 4);

            $bfh[$key] .= "\x00\x00\x00\x00";

            $bfh[$key] .= "\x00\x00\x00\x00";

            $bfh[$key] .= "\x00\x00\x00\x00";

            $bfh[$key] .= "\x00\x00\x00\x00";

        }

        $icondata  = "\x00\x00";

        $icondata .= "\x01\x00";

        $icondata .= $this->le2s(count($gd_ico_array), 2);

        $dwImageOffset = 6 + (count($gd_ico_array) * 16);

        foreach ($gd_ico_array as $key => $gd_image) {

            $icondata .= chr($IcoWidths[$key]);

            $icondata .= chr($IcoHeights[$key]);

            $icondata .= chr($totalcolors[$key]);

            $icondata .= "\x00";

            $icondata .= "\x01\x00";

            $icondata .= chr($bpp[$key])."\x00";

            $dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);

            $icondata .= $this->le2s($dwBytesInRes, 4);

            $icondata .= $this->le2s($dwImageOffset, 4);

            $dwImageOffset += strlen($bfh[$key]);

            $dwImageOffset += strlen($icXOR[$key]);

            $dwImageOffset += strlen($icAND[$key]);

        }

        foreach ($gd_ico_array as $key => $gd_image) {

            $icondata .= $bfh[$key];

            $icondata .= $icXOR[$key];

            $icondata .= $icAND[$key];

        }

        return $icondata;

    }

    function le2s($number, $minbytes=1) {

        $intstring = '';

        while ($number > 0) {

            $intstring = $intstring.chr($number & 255);

            $number >>= 8;

        }

        return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);

    }

    function gpc(&$img, $x, $y) {

        if (!is_resource($img)) {

            return false;

        }

        return @ImageColorsForIndex($img, @ImageColorAt($img, $x, $y));

    }
}